Current sensing resistors convert the current flowing through them to a voltage drop. Monitoring or measuring this voltage drop allows the current through the resistor to be measured. With current sensing resistors, materials of construction and configuration style are important parameters to consider. In terms of materials, choices include carbon composition, carbon film, ceramic composition, metal alloy, metal film, thick film (chip), thin film (chip) and wire wound. For configuration style, choices include single resistor, resistor network, and resistor chip array. Single current sensing resistors have a single resistance value. Current sensing resistor networks feature a pin layout with multiple resistors connected in series. By contrast, current sensing resistor chip arrays connect multiple resistors in parallel.
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